Biology 1

Bacteria are very small living cells (1/100th) the size of your body cell, which can rapidly reproduce inside your body.

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How does bacteria make you feel ill?

1. They damage your cells. 2. They produce toxins(poisons).

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What are viruses?

They are not cells and they are much smaller than a bacterium (1/100th of a bacterium).

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How do viruses make you feel ill?

1. They replicate themselves by invading your cells and using the cells machinery to produce copies of themselves. 2. The cell will eventually then burst, releasing all the new viruses. 3. This cell damage is what makes you ill.

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How does your body prevent microorganisms getting into your body by cuts?